Pumps – Condition responsive control of pump drive motor – By controlling drive motor motive fluid
Patent
1989-08-11
1991-11-05
Smith, Leonard E.
Pumps
Condition responsive control of pump drive motor
By controlling drive motor motive fluid
417 63, 417375, 417395, 92100, 92103SD, F04B 4306
Patent
active
050627708
ABSTRACT:
A fluid pumping apparatus and system including a double acting diaphragm pumping device in which each pumping component has a pair of spaced apart diaphragms defining a containment chamber and all exposed surfaces in the pumping chamber and the containment chamber are made of an inert plastic material, a fluid sensor extending into each containment chamber for sensing the presence of unwanted fluids therein, and a pump control system for activating the pumping apparatus and responding to an output signal generated by either sensor to deactivate the pumping apparatus in the event of leakage of fluid into either containment chamber.
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patent: 4740139 (1988-04-01), Mantell
patent: 4778356 (1988-10-01), Hicks
Cady Byron C.
Nichols Jerry A.
Story Carl E.
Scheuermann David W.
Smith Leonard E.
Systems Chemistry, Inc.
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